Just thought I'd make a thread in confirmation, this is regarding the bug that Twilight Highlands quests were giving as much exp as Jade Forest quests.
Tried to level one of my 87 monks this morning (with monk exp buff) and the questing exp in Twilight Highlands has been nerfed from like 13k p/q to 2-3k p/q, it was a significantly fast way to level and I got 7 90's from it.
Just in case people went and tried to level up that way, it's patched.